1 / 24

240 likes | 409 Views

Lecture 5. Chemical Reaction Engineering (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place. Lecture 5 – Thursday. Block 1: Mole Balances Block 2: Rate Laws Block 3: Stoichiometry

Download Presentation
## Lecture 5

**An Image/Link below is provided (as is) to download presentation**
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.
Content is provided to you AS IS for your information and personal use only.
Download presentation by click this link.
While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

**Lecture 5**Chemical Reaction Engineering (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.**Lecture 5 – Thursday**• Block 1: Mole Balances • Block 2: Rate Laws • Block 3: Stoichiometry • Stoichiometric Table: Flow • Definitions of Concentration: Flow • Gas Phase Volumetric Flow Rate • Calculate the Equilibrium Conversion Xe**Review Lecture 2**ReactorMole Balances Summary in terms of conversion, X X Batch t CSTR X W PFR PBR**Review Lecture 3**Algorithm How to find Step 1: Rate Law Step 2:Stoichiometry Step 3: Combine to get**Review Lecture 3**Reaction Engineering Mole Balance Rate Laws Stoichiometry These topics build upon one another**Flow System Stoichiometric Table**Where: and Concentration – Flow System**Stoichiometry**Concentration Flow System: LiquidPhase Flow System: Flow LiquidPhase Liquid Systems etc.**Liquid Systems**If the rate of reactionwere thenwewouldhave This gives us**StoichiometryforGas Phase Flow Systems**Combining the compressibility factor equation of state with Z = Z0 Stoichiometry: Weobtain:**StoichiometryforGas Phase Flow Systems**Since , Using the same method,**StoichiometryforGas Phase Flow Systems**The total molar flow rate is: Substituting FT gives: Where**For Gas Phase Flow Systems**Concentration Flow System: Gas Phase Flow System:**For Gas Phase Flow Systems**If –rA=kCACB This gives us FA0/-rA X**Example: Calculating the equilibrium conversion (Xef) for**gas phasereaction in a flow reactor Consider the following elementary reaction where KC=20 dm3/mol and CA0=0.2 mol/dm3. CalculateEquilibriumConversion or both a batch reactor (Xeb) and a flow reactor (Xef).**Gas Flow Example (Xef)**Rate Law: Solution:**Gas Flow Example (Xef)**Stoichiometry: Gas isothermal T=T0 Gas isobaric P=P0**Gas Flow Example (Xef)**Pure A yA0=1, CA0=yA0P0/RT0, CA0=P0/RT0 At equilibrium: -rA=0**Gas Flow Example (Xef)**Recall Flow: Batch:

More Related